Abstract:
Objectives To investigate the mechanism and effects of autophagy on gemcitabine-induced A549 lung cancer cell death.
Methods Quantitative analysis of autophagy after monodansylcadaverine(MDC) staining was performed using fluorescence microscopy. The cell viability of A549 cells after gemcitabine treatment in the presence or absence of autophagy inhibition was determined using cholecystokinin octapeptide(CCK8).Real-time polymerase chain reaction(RT-PCR) was used to measure the expression of the au-tophagy -related gene Beclin-1.Western blot analysis was used to determine the BecJin-l and caspase-3 protein levels.
Results Autophagy is involved in the gemcitabine-induced A549 lung cancer cell death.The levels of both autophagy-related genes and proteins are increased. In addition, inhibition of autophagy promoted apoptosis in the A549 lung cancer cells.
Conclusion Autophagy protects A549 lung cancer cells against gemcitabine-induced apoptosis.Moreover, cell apoptosis can be enhanced by the inhibition of autophagy.